<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script src="./js/ajax.js" type="text/javascript" charset="utf-8"></script>
    <title>Document</title>
  </head>
  <body>
    <button>点击我发送请求</button>
    <script>
      let btn = document.querySelector("button");
      btn.onclick = function () {
        ajax({
          url: "index.php",
          // url:"http://localhost:8989/",
          dataType: "json",
          success(res) {
            console.log(res);
          },
        });
      };
    </script>
  </body>
</html>
